Accession Number : AD0774327

Title :   Radiative Ignition of Polymeric Fuels in an Oxidizing Gas,

Corporate Author : PRINCETON UNIV N J DEPT OF AEROSPACE AND MECHANICAL SCIENCES

Personal Author(s) : Ohlemiller,Thomas J. ; Summerfield,Martin

Report Date : AUG 1969

Pagination or Media Count : 160

Abstract : The widespread use of a radiative energy source to study solid propellant ignition characteristics has generated the need for a closer examination of the processes comprising ignition by radiation. Radiative ignition of a pure fuel in an oxidizing gas is proposed as a useful simplified analog of propellant ignition. A simple approximate solution for the radiative ignition of a condensed material is derived by considering several asymptotic cases in which individual factors dominate the ignition delay. A radiative ignition apparatus employing a CO2 laser has been used to study the effects of radiant flux, pressure oxygen concentration, and absorptivity on the ignition delay of polystyrene and an epoxy polymer in oxygen/nitrogen mixtures. The results are shown to agree well with the approximate radiative ignition solution if an ignition temperature of approximately 600C is accepted. (Modified author abstract)

Descriptors :   *Solid rocket propellants, *Ignition, *Radiation, Polystyrene, Solid rocket fuels, Epoxy resins, Experimental design, Carbon dioxide lasers, Mathematical models, Composite propellants, Oxygen

Subject Categories : Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE